60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
import prototorch as pt
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import pytorch_lightning as pl
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from torch.utils.data import DataLoader, random_split
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from torchvision import transforms
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from torchvision.datasets import MNIST
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class MNISTDataModule(pl.LightningDataModule):
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def __init__(self, batch_size=32):
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super().__init__()
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self.batch_size = batch_size
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# Download mnist dataset as side-effect, only called on the first cpu
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def prepare_data(self):
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MNIST("~/datasets", train=True, download=True)
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MNIST("~/datasets", train=False, download=True)
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# called for every GPU/machine (assigning state is OK)
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def setup(self, stage=None):
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# Transforms
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transform = transforms.Compose([
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transforms.ToTensor(),
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])
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# Split dataset
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if stage in (None, "fit"):
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mnist_train = MNIST("~/datasets", train=True, transform=transform)
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self.mnist_train, self.mnist_val = random_split(
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mnist_train,
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[55000, 5000],
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)
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if stage == (None, "test"):
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self.mnist_test = MNIST(
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"~/datasets",
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train=False,
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transform=transform,
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)
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# Dataloaders
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def train_dataloader(self):
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mnist_train = DataLoader(self.mnist_train, batch_size=self.batch_size)
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return mnist_train
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def val_dataloader(self):
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mnist_val = DataLoader(self.mnist_val, batch_size=self.batch_size)
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return mnist_val
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def test_dataloader(self):
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mnist_test = DataLoader(self.mnist_test, batch_size=self.batch_size)
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return mnist_test
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def train_on_mnist(batch_size=256) -> type:
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class DataClass(pl.LightningModule):
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datamodule = MNISTDataModule(batch_size=batch_size)
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def prototype_initializer(self, **kwargs):
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return pt.components.Zeros((28, 28, 1))
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return DataClass
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